EP2187862B1 - Zubereitungen für zahnbleichung - Google Patents

Zubereitungen für zahnbleichung Download PDF

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Publication number
EP2187862B1
EP2187862B1 EP08806652.7A EP08806652A EP2187862B1 EP 2187862 B1 EP2187862 B1 EP 2187862B1 EP 08806652 A EP08806652 A EP 08806652A EP 2187862 B1 EP2187862 B1 EP 2187862B1
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EP
European Patent Office
Prior art keywords
urea
peroxide
adduct
ratio
alkali metal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP08806652.7A
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English (en)
French (fr)
Other versions
EP2187862A2 (de
Inventor
Christopher Todd
Sylvia Trimble
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMT RESEARCH Ltd
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SMT Research Ltd Great Britain
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/22—Peroxides; Oxygen; Ozone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/19—Cosmetics or similar toiletry preparations characterised by the composition containing inorganic ingredients
    • A61K8/24—Phosphorous; Compounds thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/40—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing nitrogen
    • A61K8/42—Amides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q11/00—Preparations for care of the teeth, of the oral cavity or of dentures; Dentifrices, e.g. toothpastes; Mouth rinses

Definitions

  • This invention relates to tooth-bleaching preparations, and to certain chemical adducts useful in the formulation thereof.
  • US2006251591 discloses dental compositions and methods for bleaching teeth directed towards hydrogen peroxide-containing compounds that are maintained at a substantially constant pH range of 6.0-10.0 during the tooth-bleaching procedure in the presence of a calcium chelating agent.
  • an adduct suitable for use in formulating a tooth-bleaching composition according to Claim 9.
  • the invention also concerns tooth bleaching preparations comprising the adduct, according to Claim 1, provided that such preparations are formulated with regard to the identity of any additional ingredients, and/or the relative proportions of those ingredients with respect to each other and/or with respect to the adduct to ensure that the tooth bleaching preparations of the invention also exhibit a pH in aqueous solution which rises by at least 1.0 upon a 10-fold dilution of the solution.
  • the inventors have found that by careful selection of the starting materials for the adduct, preferably with regard to their w/w % ratios relative to one another; by careful selection of any additional material, preferably with regard to its w/w % ratio relative to any other additional material and/or relative to the adduct; and/or by careful selection of the order or manner in which the ingredients are formulated, it is possible reliably to provide a tooth bleaching preparation which exhibits excellent tooth whitening properties and which has a pH in aqueous solution which rises on dilution (and hence in situ in the mouth when used) thereby, it is theorised, releasing additional active peroxide ions onto the teeth when used and providing thereby a superior performance with respect to certain prior art formulations which exhibit no such pH rise, or a significantly lower pH rise.
  • the pH of the aforesaid solution at 50% w/w is above 7.0.
  • the pH of the aforesaid solution at 5% w/w is above 8.0.
  • the pH rise (of the tooth bleaching preparation and/or of the starting adduct solution) is at least about 1.0 and preferably at least about 2.0 when diluted 10-fold. Such pH rises may be witnessed in the compositions of the invention even when formulated in the absence of Carbopol.
  • the peroxide and urea starting materials may be provided together as urea peroxide.
  • other peroxides preferably hydrogen peroxide, and urea may be provided as separate starting materials.
  • the adducts of the invention may include three-component adducts in which a chemical combination of each of the starting materials is present; but also two-component adducts comprising a chemical combination of two of the starting materials provided that the two-component adduct is provided in contact or association with the third starting material, but importantly as or as part of an aqueous formulation having a pH which rises on dilution.
  • the preferred alkali metal polyphosphate is an alkali metal tripolyphosphate, in particular sodium tripolyphosphate.
  • the ratio of alkali metal polyphosphate: peroxide in an aqueous solution of the adduct corresponds to an anhydrous alkali metal polyphosphate: hydrogen peroxide solution (35% w/w concentration) ratio by weight of from about 0.05:1 to about 0.5:1.
  • the ratio of alkali metal polyphosphate: urea in an aqueous solution of the adduct corresponds to an anhydrous alkali metal polyphosphate: urea ratio by weight of from about 0.1:1 to about 2.0:1.
  • the ratio of urea: peroxide in an aqueous solution of the adduct corresponds to a urea: hydrogen peroxide solution (35 %w/w concentration) ratio by weight of from about 0.2:1 to about 1.0:1
  • Also provided in accordance with the invention is a method for preparing an adduct suitable for use in formulating a tooth-bleaching composition, according to Claim 10.
  • the solution may be combined with other desirable ingredients (if any) to provide a tooth bleaching formulation.
  • Also disclosed herein is an adduct prepared in accordance with the aforesaid method, and a tooth bleaching formulation prepared in accordance with the method.
  • tooth-bleaching preparation comprising the aforesaid adduct or solution thereof.
  • the tooth-bleaching preparation in accordance with the above may comprise, in addition to the adduct, one or more further functional materials, excipients, carriers, thickeners, bleaching agents, stabilising agents and the like.
  • the preparation may be formulated as a gel, solution, powder, dispersion, emulsion or the like, preferably as a gel.
  • a peroxide/urea/polyphosphate adduct which is suitable for use in formulating a tooth-bleaching gel, is produced from the ingredients set out below: Ingredient % w/w Hydrogen peroxide (35 % soln.) 55.0 Sodium tripolyphosphate (anhydrous) 18.0 Urea 27.0
  • a tooth-bleaching gel was formulated from the adduct solution obtained in example 1 from the ingredients set out below: Ingredient % w/w Adduct 36.0 Glycerine 36.0 Polyvinylpyrrolidone 25.0 Deionised water to 100.00
  • a tooth-bleaching gel was formulated from the adduct solution obtained in example 1 from the ingredients set out below: Ingredient % w/w Adduct 35.0 Glycerine 17.0 Carbopol (polyacrylic acid) 7.0 Polyethylene glycol 6.0 Deionised water to 100.00 Sodium hydroxide (pH adjustor) q.s.
  • a tooth bleaching gel was formulated directly from the ingredients set out below.
  • Ingredient %w/w Urea 1.60
  • Hydrogen peroxide 35% 7.00
  • Caustic soda 7.50
  • Glycerine 36.45 Minors ( fragrance, sodium fluoride. etc. ) 0.90
  • Deionised water to 100
  • Stage 1 the Carbopol, glycerine and the fragrance are blended together.
  • Stage 2 the water, urea, sodium fluoride and other minor ingredients are blended until dissolved.
  • Stage 3 stages 1 & 2 are mixed until homogeneous.
  • Stage 4 caustic soda is added to stage 3 to neutralise the Carbopol.
  • Stage 5 the hydrogen peroxide and STPP are blended and added to stage 4 and blended until homogeneous. The pH then is adjusted to c. 6.5.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Birds (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Emergency Medicine (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Cosmetics (AREA)
  • Detergent Compositions (AREA)

Claims (10)

  1. Zubereitung zur Zahnbleichung, umfassend ein Addukt, das aus Ausgangsmaterialien formuliert ist, die Peroxid, Harnstoff und ein Alkalimetall-Polyphosphat umfassen,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Peroxid in einer wässrigen Lösung des Addukts einer wasserfreien Alkalimetall-Polyphosphathydrogen : Peroxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,05:1 bis etwa 0,5:1, entspricht,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Harnstoff in einer wässrigen Lösung des Addukts einem wasserfreien Alkalimetall-Polyphosphat : Harnstoff-Gewichtsverhältnis von etwa 0,1 : 1 bis etwa 2,0 : 1 entspricht.
    wobei das Verhältnis von Harnstoff : Peroxid in einer wässrigen Lösung des Addukts einer Harnstoff : Wasserstoffperoxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,2:1 bis etwa 1,0:1 entspricht,
    wobei das Addukt in der Zubereitung in wässriger Lösung vorgesehen wird und die Zubereitung und/oder das Addukt einen pH in wässriger Lösung aufweist, der um zumindest 1,0 bei einer 10-fachen Verdünnung der Lösung ansteigt,
    wobei die Peroxid- und Harnstoff-Ausgangsmaterialien entweder zusammen als Harnstoffperoxid vorgesehen werden, oder als separate Ausgangsmaterialien, wobei das Peroxid Wasserstoffperoxid ist.
  2. Zubereitung zur Zahnbleichung nach Anspruch 1, wobei der pH-Anstieg zumindest etwa 0,5 bei 5-facher Verdünnung beträgt.
  3. Zubereitung zur Zahnbleichung nach Anspruch 2, wobei der pH-Anstieg zumindest etwa 0,25 bei 2-facher Verdünnung beträgt.
  4. Zubereitung zur Zahnbleichung nach einem der Ansprüche 1 bis 3, wobei der pH der Lösung bei 50 Gew.-% über 7,0 liegt.
  5. Zubereitung zur Zahnbleichung nach einem der Ansprüche 4 bis 5, wobei der pH der Lösung bei einer Verdünnung auf 5 Gew.-% über 8,0 liegt.
  6. Zubereitung zur Zahnbleichung nach einem der Ansprüche 1 bis 5, wobei das Alkalimetall-Polyphosphat ein Alkalimetall-Tripolyphosphat ist.
  7. Zubereitung zur Zahnbleichung nach Anspruch 6, wobei das Alkalimetall-Tripolyphosphat Natrium-Tripolyphosphat ist.
  8. Zubereitung zur Zahnbleichung nach einem der Ansprüche 1 bis 7, umfassend ein oder mehrere weitere funktionelle Materialien, Hilfsstoffe, Trägerstoffe, Verdickungsmittel, Bleichwirkstoffe und/oder Stabilisatoren.
  9. Addukt, das zur Verwendung in der Formulierung einer Zusammensetzung zur Zahnbleichung geeignet ist, wobei das Addukt aus Ausgangsmaterialien formuliert ist, die Peroxid umfassen,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Peroxid in einer wässrigen Lösung des Addukts einer wasserfreien Alkalimetall-Polyphosphathydrogen : Peroxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,05:1 bis etwa 0,5:1, entspricht,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Harnstoff in einer wässrigen Lösung des Addukts einem wasserfreien Alkalimetall-Polyphosphat : Harnstoff-Gewichtsverhältnis von etwa 0,1 : 1 bis etwa 2,0 : 1 entspricht
    wobei das Verhältnis von Harnstoff : Peroxid in einer wässrigen Lösung des Addukts einer Harnstoff : Wasserstoffperoxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,2:1 bis etwa 1,0:1 entspricht,
    wobei das Addukt einen pH in wässriger Lösung aufweist, der um zumindest 1,0 bei einer 10-fachen Verdünnung der Lösung ansteigt, wobei die Peroxid- und Harnstoff-Ausgangsmaterialien entweder zusammen als Harnstoffperoxid vorgesehen werden, oder als separate Ausgangsmaterialien, wobei das Peroxid Wasserstoffperoxid ist.
  10. Verfahren zur Zubereitung eines Addukts, das aus Ausgangsmaterialien formuliert ist, die Peroxid, Harnstoff und ein Alkalimetall-Polyphosphat umfassen,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Peroxid in einer wässrigen Lösung des Addukts einer wasserfreien Alkalimetall-Polyphosphathydrogen : Peroxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,05:1 bis etwa 0,5:1, entspricht,
    wobei das Verhältnis von Alkalimetall-Polyphosphat : Harnstoff in einer wässrigen Lösung des Addukts einem wasserfreien Alkalimetall-Polyphosphat : Harnstoff-Gewichtsverhältnis von etwa 0,1 : 1 bis etwa 2,0 : 1 entspricht,
    wobei das Verhältnis von Harnstoff : Peroxid in einer wässrigen Lösung des Addukts einer Harnstoff : Wasserstoffperoxid-Lösung, 35 Gew.-% Konzentration, Gewichtsverhältnis von etwa 0,2:1 bis etwa 1,0:1 entspricht,
    wobei das Addukt einen pH in wässriger Lösung aufweist, der um zumindest 1,0 bei einer 10-fachen Verdünnung der Lösung ansteigt, wobei das Verfahren umfasst: Bereitstellen der Ausgangsmaterialien und Mischen der Ausgangsmaterialien in wässriger Lösung unter Temperatur- und/oder Druck- und/oder Rührbedingungen, die wirksam sind, um eine Lösung der Ausgangsmaterialien bereitzustellen, und
    wobei die Peroxid- und Harnstoff-Ausgangsmaterialien entweder zusammen als Harnstoffperoxid vorgesehen werden, oder als separate Ausgangsmaterialien, wobei das Peroxid Wasserstoffperoxid ist.
EP08806652.7A 2007-09-20 2008-09-18 Zubereitungen für zahnbleichung Active EP2187862B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0718346A GB0718346D0 (en) 2007-09-20 2007-09-20 Tooth-bleaching preparations
PCT/GB2008/050836 WO2009037505A2 (en) 2007-09-20 2008-09-18 Tooth-bleaching preparations

Publications (2)

Publication Number Publication Date
EP2187862A2 EP2187862A2 (de) 2010-05-26
EP2187862B1 true EP2187862B1 (de) 2018-10-24

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EP08806652.7A Active EP2187862B1 (de) 2007-09-20 2008-09-18 Zubereitungen für zahnbleichung

Country Status (15)

Country Link
US (2) US8815217B2 (de)
EP (1) EP2187862B1 (de)
JP (1) JP5737939B2 (de)
KR (1) KR101485353B1 (de)
CN (1) CN101808614B (de)
AU (1) AU2008300369B2 (de)
BR (1) BRPI0816953B1 (de)
CA (1) CA2699870C (de)
ES (1) ES2705619T3 (de)
GB (1) GB0718346D0 (de)
MX (1) MX2010002718A (de)
MY (1) MY157048A (de)
NZ (1) NZ584033A (de)
RU (1) RU2496471C2 (de)
WO (1) WO2009037505A2 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101942368B (zh) * 2010-09-25 2011-12-07 杜井民 羊毛脱黄去污剂
CA2892844A1 (en) * 2012-12-21 2014-06-26 Colgate-Palmolive Company Controlled delivery whitening compositions
JP5615968B1 (ja) * 2013-12-19 2014-10-29 株式会社エイ・アイ・シー 歯牙用漂白剤、及び歯牙の漂白方法
JP6494968B2 (ja) * 2014-09-26 2019-04-03 株式会社ジーシー 歯牙漂白用組成物
AU2015417678A1 (en) * 2015-12-17 2018-05-31 Colgate-Palmolive Company Multicomponent bleaching system

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US3957967A (en) * 1973-07-27 1976-05-18 Blendax-Werke R. Schneider & Co. Agent for the care and the cleaning of teeth and dentures
AU660691B2 (en) * 1991-09-13 1995-07-06 Colgate-Palmolive Company, The Abrasive tooth whitening dentifrice of improved stability
US5648064A (en) * 1995-07-07 1997-07-15 Gaffar; Abdul Oral compositions having accelerated tooth whitening effect
EP1210062A4 (de) * 1999-09-09 2003-06-25 Discus Dental Inc Zahnbleichgel mit erhöhtem peroxidgehalt
US6682722B2 (en) 2001-09-19 2004-01-27 The Procter & Gamble Company Oral compositions providing enhanced overall cleaning
US6685916B1 (en) * 2002-10-31 2004-02-03 Cadbury Adams Usa Llc Compositions for removing stains from dental surfaces, and methods of making and using the same
US20040202621A1 (en) * 2002-12-23 2004-10-14 Orlowski Jan A. Teeth whitening system based on the combination of hydrogen peroxide and carbamide peroxide
KR100507675B1 (ko) * 2003-05-30 2005-08-09 이상호 젤리형 치아미백용 패치
US9271904B2 (en) * 2003-11-21 2016-03-01 Intercontinental Great Brands Llc Controlled release oral delivery systems
MX2007005450A (es) * 2004-11-09 2007-07-10 Discus Dental Impressions Inc Composiciones para blanqueado dental de dos componentes.
JP4677029B2 (ja) * 2005-03-18 2011-04-27 エル・ジー ハウスホールド アンド ヘルスケア リミティッド 歯牙美白剤
US20070166244A1 (en) * 2006-01-19 2007-07-19 The Procter & Gamble Company Compositions comprising silicone pressure sensitive adhesives for delivering oral care substances
JP2008081442A (ja) * 2006-09-27 2008-04-10 Gc Corp 歯面清掃方法及び歯面清掃用組成物

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Also Published As

Publication number Publication date
JP2010540427A (ja) 2010-12-24
US9119795B2 (en) 2015-09-01
NZ584033A (en) 2011-09-30
MX2010002718A (es) 2010-08-18
AU2008300369A1 (en) 2009-03-26
AU2008300369B2 (en) 2013-03-21
RU2496471C2 (ru) 2013-10-27
CA2699870A1 (en) 2009-03-26
RU2010115502A (ru) 2011-10-27
CN101808614B (zh) 2013-10-09
WO2009037505A3 (en) 2009-06-18
JP5737939B2 (ja) 2015-06-17
KR101485353B1 (ko) 2015-01-23
EP2187862A2 (de) 2010-05-26
CN101808614A (zh) 2010-08-18
BRPI0816953B1 (pt) 2016-05-31
WO2009037505A2 (en) 2009-03-26
US20110002860A1 (en) 2011-01-06
US8815217B2 (en) 2014-08-26
MY157048A (en) 2016-04-15
BRPI0816953A2 (pt) 2014-10-07
ES2705619T3 (es) 2019-03-26
GB0718346D0 (en) 2007-10-31
US20140328773A1 (en) 2014-11-06
KR20100075502A (ko) 2010-07-02
CA2699870C (en) 2016-01-19

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